f75377 Feature Integration Technology Inc., f75377 Datasheet - Page 36

• Manufacturer Part Number: f75377
• Description: Monitor With Automatic Speed Control
• Manufacturer: Feature Integration Technology Inc.

Address
3-0
7.49
A0h
A1h
A2h
A3h
A4h
A5h
FAN_FAULT_TIME
Fan1 Index A0h- AFh
Attribute
R/W
R/W
R/W
R/W
RO
RO
Default
Value
8’h00
8’h01
8’h03
8’h0f
R/W
8’hff
8’hff
ah
Description
FAN1 count reading (MSB). At the moment of reading this register, the LSB will
be latched. This will prevent from data updating when reading. To read the fan
count correctly, read MSB first and followed read the LSB.
FAN1 count reading (LSB).
RPM mode(CR96 bit0=0):
FAN1 expect speed count value (MSB), in auto fan mode (CR96 bit1
register is auto updated by hardware.
Duty mode(CR96 bit0=1):
This byte is reserved byte.
RPM mode(CR96 bit0=0):
FAN1 expect speed count value (LSB) or expect PWM duty, in auto fan mode
this register is auto updated by hardware and read only.
Duty mode(CR96 bit0=1):
The Value programming in this byte is duty value. In auto fan mode(CR96
bit1
Ex: 5
FAN1 full speed count reading (MSB). At the moment of reading this register,
the LSB will be latched. This will prevent from data updating when reading. To
read the fan count correctly, read MSB first and followed read the LSB.
FAN1 full speed count reading (LSB).
255
This register determines the time of fan fault. The condition to cause fan
fault event is:
When PWM_Duty reaches FFh, if the fan speed count can’t reach the fan
expect count in time.
The unit of this register is 1 second. The default value is 11 seconds.
(Set to 0 , means 1 seconds. ; Set to 1, means 2 seconds.
Another condition to cause fan fault event is fan stop and the PWM duty is
greater than the minimum duty programmed by the register index 9C-9Dh.
0) this register is updated by hardware.
Set to 2, means 3 seconds. …. )
5*100/255 %
100%
36
F75377
0) this
March.
V0.12P
, 2008